Mqrtising-machine



(No Model.) 2 SheetsSheet 1.

R. s. GREENLEE.

MORTISING MACHINE. No. 377,749. Patented Feb. 14, 1888.-

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UNITED STATES "PATENT- OFFICE.

RALPH s. GREENLEE, or cHIcAeo, ILLINOIS.

MORTISING-MACHINE. p

sPH CIPIC'A'IION forming part of Letters Patent No. 377,749, datedFebruary 14, 1888;.

Application filed May 9, 1887. Serial No. 237,545. (No model.)

- end view of Fig. 1, looking inthe direction of dart 17, with some ofthe detail parts removed; Fig. 3, a top or plan view of Fig. 1; Fig. 4,an enlarged detached view of the mechanism for elevating and depressingthe table to the machine; Fig. 5, an enlarged elevation of the segmentattachment and the devices. operating therewith removed from the otherparts; Fig. 6, Sheet 2, an elevation of the front of the machine; Fig.-7, an enlarged vertical central Iongitudinal sectional elevation of Fig.3 on line 18; Fig. 8, a top or plan viewof the grooved crank-disk to thefeed devices removed; Fig. 9, an enlarged elevation of the wormdrivinggear and section of its oil-cup removed; Fig. 10, an end view oftheworm driving-gear and elevation of its oil-cup; Fig. 11, a top viewof the clutch to the feed devices, also enlarged and removed; Fig. 12,an enlarged top view of the bracket which supports the lower portion ofthe shaft of the worm-gear; Fig. 13, the

' treadle for putting the feed-mechanism in gear enlarged; Fig. 14, aview of the end of the bit enlarged; Fig. 15, a side elevation of theend of the bit; Fig. 16, the end of the chisel.

This invention relates to improvements in 7 machines by which mortisingis done by a hollow chisel and bit; and the improvements, in brief,consist, first, of worm-gear, one part of which is on a horizontaldrive-shaft and the other part on a vertical crank-shaft which runscontinuously, and which operates in connection with the crank-shaft anda verticallyoperating clutch, whereby the hollow chisel has given to itthe necessary horizontal reciprocating movement, and in novel means forelevating and depressing the table which supports the material to bemortised and, further, in the novel construction of the bit or angerwhich operates in the hollow chisel, as the whole is herein fully shownand described;

A represents what is generally known as a housing-frame, made convenientfor supporting the mechanism.

B represents the table for supporting the material to be mortised, and CJ I the ordinary mechanism for clamping the material to the table. Thistable is supported so as to have a vertical reciprocating movement bymeans of ordinary guides, 23,'Fig. 3, andso as to have a longitudinalmovement by means i of ordinary guides, 24, Fig. 1. The means forelevating and depressing the table consists of a shaft, Q. pivoted tothe frame A and supporting a lever, 4, and a hand-lever, P, the

former being inside of the frame, the latter' outside thereof. Theinnerend of the lever A 4 supports a counterbalancing-weight, '9, and

the outer end connects'with a link, 6, the upper end of the link beingjointed to the under side of the table by a joint, 5, Fig. 1.

Attached to the outside of the frame A is a slotted segment, 0, on thetop of which is marked a scale, by which the height of the table may beknown by the position of the lever P on the segment. The lever P isconnected with the slotted segment by means of a block, o, which slidesin the slot of the segment, audit is clamped to the segment by thehand-wheel T, a collar, U, being interposed, if desired, between theshoulder on the shank of the wheel and the block. The screw-hole in theblock is shown at X, Fig. 5, and the hole for the stop-pin Y on thespring-catch W to the lever P is shown at 25. I prefer two hand-wheelsT, each with a block attachment,

as at o, 'so that the lever P may be connected with either block to holdthe table in any Vertical position required to make any given mortise.The ordinary means forrnoving the table B longitudinally consists of arack and pinion, 26.

6 .shows a drive-worm on shaft d, meshing into a worm-gear, ff, which ishung loose on shaft is and supported thereon by a collar, 20,

Fig. 7. To the lower end of the shaft is is feathered a sliding clutch,g, which operates in a recess, 12, in the worm-gear f f, and the top ofclutch g isprovided with pins h h, which are made to engage dependingpins 2' i on the gear ff by means of a treadle, S, which is pivoted tothe frame A at 13, and has prongs 10, engaging notches 11 11 in theclutch g. A spring, j, is placed around the shaft is and between thecollar and clutch whereby so soon as the foot is removed from thetreadle S the feed of the chisel will cease.

u is a bracket supporting the lower portion of the shaft is, and abracket, 27, supports the upper portion.

Zm is a grooved crank-disk, which is attached to and rotates with theshaft k, and in its groove on is placed an adjustable wrist-pin,28,connecting with a rod, 19, which is connected with the sliding box Nby means of an adjustable wrist-pin, r. The adjustment of the wrist-pin28 governs the depth the chisel is to cut, and the adjustment of the pin1' is to compensate for the wear of the chisel or for ehisels ofdifferent lengths.

F is a long driven pulley secured to the bit- .shaft G- by means ofscrews 16 16.

G is an ordinary balance-wheel on shaft G.

It will be seen at Figs. 1, 2, and 3 that the boxes N run in ways 29 29.

c is a drive band-wheel on shaft d, a band, M, running from it to longpulley F.

b 7 2 3 is a suitable tightening device for belt M.

K L represent a tight and loose pulley on shaft 11.

The bit is fed by pressure and has no screwpoint to draw it in, and tomake it clear the chips better its cutting-edges are inclined forwardfrom the end of the axial line thereof, and extend on radial linesbeyond the other portions of the twist, so as to come quite closely tothe cutting-edges of the chisel D, the orifice H in which being quitelarge for the discharge of the chips.

The movements of the chisel and bit are as follows: The shaft dis inconstant motion, so that by depressing the treadle S the clutch g, bymeans of the pins i i, will engage the gear 5 ff and put the shaft k anddisk lm in rotation. This will, by a half rotation of the disk,

feed the bit E and'chisel D forward to cut a mortise of a depthcorresponding to the distancethe wrist-pin 28 is adjusted from thecenter of the disk, and the other half-rotation of the disk willwithdraw the .chisel and bit by means of the connecting-rod p, jointedto one of the sliding boxes N, which supports the frame to which thechisel D is aflixed, and. to which the bit is journaled, the bit beingdriven by a belt, w, on the long pulley F.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

1. An improveinentinmortising-machines, consisting of theshaft Q, placedparallel with the table B, in combination with the lever 4, made rigidon the shaft, the counter-balance 9, link 6, table B, lever P, maderigid to the shaft Q, spring-stop W Y, and the slotted segment 0,carrying two blocks, 12, notched at 25, fitted to slide on thesegment,and the handwheels T T, with the screws for clamping the blocks'0 at two given points on the segment, as specified.

2. The worm drive-gear e and shaft d, in combination with the wormff,clutch g, spring j, shaft k, grooved crankwheell m, the connecting-rodadj ustably connected with the wheel Zm, and sliding frame N, foroperating the chisel D, as specified.

3. The horizontal shaft d and the worm driving-gear e thereon, incombination with the vertical shaft k and the worm'gear ff thereon, thevertically-operating clutch g, the disk-wheell m, treadle S, and pitmanp, as specified.

4. The twisted bit E without a screw-point, and with the cutting-edgesinclined forward from the end of the axial line of the same, andextending radially beyond the other portions of the twist, as specified.

RALPH s. GREENLEE.

YVitnesses:

' G. L. GHAPIN,

ANNA D. JOHNSON.

